Simulation and Hazard Map of Flooding Caused by the Break of a Concrete Gravitational Dam

Abstract The simulation of Concrete Gravitational Dam burst floods is an important research content in the field disaster prevention and mitigation water conservancy projects. Due to extreme rainfall, earthquake, structure failure etc., concrete gravitational dam usually breaks a short time period. break flood will give risk downstream communities. Taking Kaliwa Philippines as example, based on channel body measured terrain both sides, numerical model one-dimensional two-dimensional coupled evolution constructed, process collapse carried out, counts inundation range, depth, flow velocity, arrival other causing factors area, draws hazard map banks downstream. results show that KALIWA accident occurred, total area over 38 km 2 Dam. peak takes 1.5 h reach estuary, which shortest time. General Nakar City Infanta are inundated completely with depth 1.0 m 2.0 m. near upper reaches lower estuary open flat, be affected seriously by flood. It proposed build warning system people provide scientific basis for dam-break analysis, assessment.